Introduction to the phenol urethane binder for self-hardening molding achieving quick and uniform hardening to the depth of the cast.
Overview
The Asahi no-bake method with organic self-hardening binder for casting (phenol urethane self-hardening property) takes advantage of the self-curability that induces the urethanation reaction of aggregate, such as silica sand, with the presence of a phenol resin, polyisocyanate and a basic catalyst to produce binding force between sand particles. As it induces fast uniform hardening to the depth of the cast, it is ideal as a binder for main molds and cores for small and midsize casts. It is used in a broad array of applications including plain cast iron, ductile cast iron, cast steel and light alloys. As a combination of technologies independently developed by us, the Asahi no-bake method is adopted and well received by a large number of foundries in Japan.
Forms
Liquid resins and hardening agents
Applications
● Aluminum casting
● Casting of cast iron and cast steel
● Applicable to various other casting methods
Features
● It has the highest hardening velocity among ambient temperature self-hardening binders. In addition, it is characterized with a long usable time in comparison with the cast removing time. As it produces good internal hardening results, it is a self-hardening binder with a top forming velocity.
● The sand recovered can be easily reclaimed with a normal mechanical reclamation machine. The amount of binder to be added to the reclaimed sand may be smaller than that added to new sand.
● When it is used in a core for greensand mold, it has little impact on the greensand.
● Without sulfur content, it does not inhibit spherodization of ductile cast iron (spherical graphitic cast iron). For the above reasons, the Asahi no-bake binder is ideal for intermediate mass produced or mass produced items or for small or midsize items. It is particularly suited for cores for high-speed main mold forming lines and for ductile cast iron. It is applied to a wide range of materials, including plain cast iron, cast steel and light alloys.
